WO2007109427B1 - Lamp electrode and method for delivering mercury - Google Patents

Lamp electrode and method for delivering mercury

Info

Publication number
WO2007109427B1
WO2007109427B1 PCT/US2007/063539 US2007063539W WO2007109427B1 WO 2007109427 B1 WO2007109427 B1 WO 2007109427B1 US 2007063539 W US2007063539 W US 2007063539W WO 2007109427 B1 WO2007109427 B1 WO 2007109427B1
Authority
WO
WIPO (PCT)
Prior art keywords
container
mercury
shell
vitreous
lamp electrode
Prior art date
Application number
PCT/US2007/063539
Other languages
French (fr)
Other versions
WO2007109427A2 (en
WO2007109427A3 (en
Inventor
Ludwig P Kiermaier
Original Assignee
E G L Company Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from US11/376,576 external-priority patent/US20070216308A1/en
Application filed by E G L Company Inc filed Critical E G L Company Inc
Priority to EP07758121A priority Critical patent/EP2005462A2/en
Priority to BRPI0707057-8A priority patent/BRPI0707057A2/en
Publication of WO2007109427A2 publication Critical patent/WO2007109427A2/en
Publication of WO2007109427A3 publication Critical patent/WO2007109427A3/en
Publication of WO2007109427B1 publication Critical patent/WO2007109427B1/en

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
    • H01J9/38—Exhausting, degassing, filling, or cleaning vessels
    • H01J9/395—Filling vessels
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/02—Details
    • H01J61/04—Electrodes; Screens; Shields
    • H01J61/06—Main electrodes
    • H01J61/09—Hollow cathodes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/70—Lamps with low-pressure unconstricted discharge having a cold pressure < 400 Torr
    • H01J61/72—Lamps with low-pressure unconstricted discharge having a cold pressure < 400 Torr having a main light-emitting filling of easily vaporisable metal vapour, e.g. mercury

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Vessels And Coating Films For Discharge Lamps (AREA)

Abstract

A lamp electrode adapted to deliver mercury during an assembly process, comprising;an electrode subassembly including; a metallic shell (46) having a proximal end (46A) and a distal end each lying along a central axis (58), a supporting electrical lead (50) attached to the proximal end of said metallic shell, and a vitreous tube (54) fused onto said electrical lead to surround said shell; and a container (10) having a sidewall, a sealed end, and a longitudinal axis, said container containing a substance for delivering mercury upon heating of said container, said container being attached to said electrode subassembly and spaced proximally from said metallic shell, the longitudinal axis of the container being skewed relative to said central axis to orient said container in a direction to reduce discharge of mercury directly toward said metallic shell.

Claims

23
AMENDED CLAIMS
[received by the International Bureau on 04 February 2008 (04.02.08) - 6 pages]
1. A lamp electrode adapted to deliver mercury during an assembly process, comprising: an electrode subassembly including: (a) a metallic shell having a proximal end and a distal end each lying along a central axis, (b) a supporting electrical lead attached to the proximal end of said metallic shell, and (c) a vitreous tube fused onto said electrical lead to surround said shell; and a container having a sidewall, a sealed end, and a longitudinal axis, said container containing a substance for delivering mercury upon heating of said container, said container being attached to said electrode subassembly and spaced proximally from said metallic shell, the longitudinal axis of the container being skewed to avoid parallelism relative to said central axis in order to orient said container m a direction to reduce discharge of mercury directly toward said metallic shell.
2, A lamp electrode according to claim 1 wherein said sealed end is prone to opening upon heating of said container,
3. A lamp electrode according to claim 1 wherein said container is spaced proxϊmaUy from said metallic shell by an offset distance in order to avoid premature mercury delivery from said container upon heating of said shell.
4. A lamp electrode according to claim 1 wherein said container has opposite said sealed end an opposite end, said sidewall being between said opposite end and said sealed end, said sidewall of said container being attached to said electrical lead.
5. A lamp electrode according to claim 1 wherein said electrode sυbassembly comprises a rod attached to said shell, said container being attached to said rod.
6. A lamp electrode according to claim 1 wherein said container contains in addition to the mercury delivering substance an inert gas.
7, A lamp electrode according to claim 1 wherein said container has opposite said sealed end an opposite end that is further from said shell than said sealed end, said sealed end being prone to opening upon heating of said container, said sealed end being directed toward a path that runs between said metallic shell and said vitreous tube,
8. A lamp electrode according to claim 7 wherein said sealed end of said container is further from said central axis than the opposite end of said container.
9. A lamp electrode according to claim 7 wherein said longitudinal axis of said container intersects a plane transverse to the central axis at an acute angle of at most 85°.
10. A lamp electrode according to claim 1 wherein said container comprises: a cup; and a annular header with a flange sealingiy attached to said cup, said cup having a mouth with an outwardly projecting lip and a domed bottom, said sϊdewall being shaped substantially cylindrically.
11. A lamp electrode according to claim 1 wherein said lead has a hairpin configuration with a hairpin turn that is attached to said shell, said lead lying in a central plane, the longitudinal axis of said container being parallel to said central plane.
12. A lamp electrode adapted to deliver mercury during an assembly 25
process, comprising: an electrode subassembly including: (a) a metallic shell having a proximal end and a distal end each lying along a central axis, (b) a supporting electrical lead attached to the proximal end of said metallic shell, and (c) a vitreous tube fused onto said electrical lead to surround said shell; and a container containing a substance for delivering mercury upon heating of said container, said container having a sealed end with a vitreous plug, said container being attached (1) to the supporting electrical lead or (2) to a cantilevered metal rod attached to either the metallic shell or the supporting electrical lead, at least a portion of said cantilevered metal rod being placed past the proximal end of said metallic shell, said container being spaced proximally from said metallic shell.
13. A lamp electrode according to claim 12 wherein said sealed end is prone to opening upon heating of said container.
14. A lamp electrode according to claim 12 wherein said plug comprises lead-free glass that is prone to melting upon heating of said container.
15, A lamp electrode according to claim 12 wherein said plug comprises glass that is prone to one or more of melting, fracturing, or dislodging upon heating of said container.
16. A lamp electrode according to claim 12 wherein said plug is color coded to indicate the quantity of mercury delivering substance in said container.
17. A lamp electrode according to claim 12 wherein said container has a metallic cup that is attached to said electrical lead. 26
18. A lamp electrode according to claim 12 wherein said electrode subassembly comprises a rod attached to said shell, said container being attached to said rod.
19. A lamp electrode according to claim 12 wherein said container has opposite said vitreous plug an opposite end that is further from said shell than said sealed end.
20. A lamp electrode according to claim 12 wherein said container comprises: a cup and an annular header sealingly attached to said cup, said vitreous plug being centrally mounted in said header.
21. A lamp electrode according to claim 20 wherein said header has a flange, said cup having a mouth with an outwardly projecting lip and a domed bottom, said sidewall being cylindrically shaped,
22. A lamp electrode according to claim 12 wherein said lead has a hairpin configuration with a hairpin turn attached to said shell, said lead lying in a central plane, said container having a longitudinal axis that is parallel to said central plane.
23. A lamp electrode adapted to deliver mercury during an assembly process, comprising: an electrode subassembly including: (a) a metallic shell having a proximal end and a distal end each lying along a central axis, (b) a supporting electrical lead attached to said proximal end of said metallic shell, and (c) a vitreous tube fused onto said electrical lead to surround said shell; and a container spaced proximally from said shell and having a sidewall, a 27
sealed end, and a longitudinal axis, said container containing a substance for delivering mercury upon heating of said container, said container being supported by said electrode subassembly, said sealed end being prone to opening upon heating of said container, the container being oriented in a direction to reduce discharge of mercury directly toward said metallic shell.
24. A method for releasing a dose of mercury from a container attached to an electrode subassembly having a vitreous tube surrounding a shell supported by an electrical lead, the method comprising the steps of: orienting said container to reduce discharge of mercury directly toward said metallic shell; and heating said container to open said container and discharge a mercury dose contained therein by (a) melting the vitreous plug to discharge a mercury dose, or (b) heating the container sufficiently to expel the header.
27. A method according to claim 24 comprising the step of: filling said container with liquid mercury and an inert gas.
28. A method according to claim 24 wherein the step of orienting said container being performed to cause discharge of mercury along a path between said vitreous tube and said metallic shell.
29. A method according to claim 24 comprising the step of; sealing said container at a sealed end, the step of orienting said container being performed by positioning an end of said container that is opposite said sealed end further from said shell than said sealed end, the step of heating said container being performed to open said sealed end.
30. A method according to claim 29 wherein the step of orienting said container being performed by positioning the end of said container opposite said sealed end further from said vitreous tube than the sealed end of said container. 28
31. A method according to claim 30 comprising the step of: fusing said vitreous tube to said electrical lead without bringing melted portions of said tube close enough to said container to open it.
32. A method for releasing a dose of mercury employing an electrode subassembly supporting a container with a vitreous sealing plug, comprising the steps of: heating said vitreous sealing plug to defeat its sealing properties and open said container in order to discharge a mercury dose contained therein in proximity to said electrode subassembly,
33. A method according to claim 32 wherein the step of heating said vitreous plug is performed by melting said vitreous plug in order to open said container.
34. A method according to claim 32 wherein the step of heating said vitreous plug is performed by fracturing said vitreous plug in order to open said container.
35. A method according to claim 32 wherein the step of heating said vitreous plug is performed by dislodging said vitreous plug in order to open said container.
36, A method according to claim 32 comprising the step of: fusing said vitreous tube to said electrical lead without bringing melted portions of said tube close enough to said container to open it
37. A method according to claim 32 comprising the step of; color coding the vitreous plug to indicate mercury dosage in said container.
PCT/US2007/063539 2006-03-16 2007-03-08 Lamp electrode and method for delivering mercury WO2007109427A2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP07758121A EP2005462A2 (en) 2006-03-16 2007-03-08 Lamp electrode and method for delivering mercury
BRPI0707057-8A BRPI0707057A2 (en) 2006-03-16 2007-03-08 lamp electrode and method for supplying mercury

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US11/376,576 2006-03-16
US11/376,576 US20070216308A1 (en) 2006-03-16 2006-03-16 Lamp electrode and method for delivering mercury
US11/522,547 2006-09-14
US11/522,547 US7625258B2 (en) 2006-03-16 2006-09-14 Lamp electrode and method for delivering mercury

Publications (3)

Publication Number Publication Date
WO2007109427A2 WO2007109427A2 (en) 2007-09-27
WO2007109427A3 WO2007109427A3 (en) 2008-02-07
WO2007109427B1 true WO2007109427B1 (en) 2008-03-20

Family

ID=38457688

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2007/063539 WO2007109427A2 (en) 2006-03-16 2007-03-08 Lamp electrode and method for delivering mercury

Country Status (5)

Country Link
US (2) US7625258B2 (en)
EP (1) EP2005462A2 (en)
BR (1) BRPI0707057A2 (en)
RU (1) RU2008140695A (en)
WO (1) WO2007109427A2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7625258B2 (en) * 2006-03-16 2009-12-01 E.G.L. Company Inc. Lamp electrode and method for delivering mercury

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Also Published As

Publication number Publication date
RU2008140695A (en) 2010-04-27
BRPI0707057A2 (en) 2011-04-19
US20070216282A1 (en) 2007-09-20
US7625258B2 (en) 2009-12-01
WO2007109427A2 (en) 2007-09-27
US20070216309A1 (en) 2007-09-20
WO2007109427A3 (en) 2008-02-07
US7288882B1 (en) 2007-10-30
EP2005462A2 (en) 2008-12-24

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